Question

我正在尝试创建一个地图活动，显示用户当前位置，可以缩放到街道级别，但我的应用程序无法正常工作，您认为我需要添加的代码是什么？

public class Map_Activity extends FragmentActivity implements GooglePlayServicesClient.ConnectionCallbacks,
        GooglePlayServicesClient.OnConnectionFailedListener,
        com.google.android.gms.location.LocationListener{

    private GoogleMap myMap;
    private LocationClient myLocationClient;
    private static final LocationRequest REQUEST = LocationRequest.create()
            .setInterval(5000)
            .setFastestInterval(16)
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_map);
        getMapReference();

    }
    @Override
    protected void onResume(){
        super.onResume();
        getMapReference();
        wakeUpLocationClient();
        myLocationClient.connect();
    }
    @Override
    public void onPause(){
        super.onPause();
        if (myLocationClient != null){
            myLocationClient.disconnect();
        }
    }
    private void gotoMyLocation(double lat, double lng) {
        changeCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder().target(new LatLng(lat, lng))
                        .zoom(15.5f)
                        .bearing(0)
                        .tilt(25)
                        .build()
        ), new GoogleMap.CancelableCallback() {
            @Override
            public void onFinish() {
            }
            @Override
            public void onCancel() {
            }
        });
    }
    private void wakeUpLocationClient(){
        if(myLocationClient == null){
            myLocationClient = new LocationClient(getApplicationContext(),this,this);
        }
    }
    private void getMapReference(){
        if(myMap==null){
            myMap = ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        }
        if (myMap != null){
            myMap.setMyLocationEnabled(true);
        }
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_map, menu);
        return true;
    }
    @Override
    public void onConnected(Bundle bundle){
        myLocationClient.requestLocationUpdates( REQUEST, this);

    }

    @Override
    public void onDisconnected(){

    }
    @Override
    public void onLocationChanged(Location location){

    }
    @Override
    public void onConnectionFailed(ConnectionResult connectionResult){

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    private void changeCamera(CameraUpdate update, GoogleMap.CancelableCallback callback) {

        myMap.moveCamera(update);
    }
}

该应用正在运行，但地图未显示且未显示我当前位置:(我希望有人可以帮助我

Answer 1

以下是使用GoogleMaps的一步一步：

A.配置您的项目以使用GoogleMaps（如果配置不正确，您的地图可能不会显示）：

in＆＃34; build.graddle＆＃34;添加适当版本的依赖项，例如6.5.87或8.1.0： compile 'com.google.android.gms:play-services:8.1.0'
＆＃34; Android.Manifest＆＃34;添加权限，GL和API密钥（确保放置您的APIKey）：

< uses-permission android:name="android.permission.WAKE_LOCK" /> < uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> < uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> < uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> < uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> < uses-permission android:name="android.permission.INTERNET" /> < uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> < uses-feature android:glEsVersion="0x00020000" android:required="true"/>  <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="YOUR API KEY" /> <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />

B中。代码：

使用OnMapReady：
- 添加＆＃34; OnMapReadyCallback＆＃34;到你的活动课： public class Map_Activity extends FragmentActivity implements GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener, OnMapReadyCallback {
- 覆盖onMapReady以启用位置并引用GoogleMap：
  
  @Override public void onMapReady(GoogleMap map) { map.setMyLocationEnabled(true); googleMap = map; }
在Activity-OnCrate中调用getMapAsync：

FragmentManager fm = getSupportFragmentManager(); SupportMapFragment mapFragment = (SupportMapFragment) fm.findFragmentById(R.id.map); mapFragment.getMapAsync(this);

℃。删除/替换已弃用的代码：

-LocationClient
-replace "GooglePlayServicesClient" with GoogleApiClient

使用实时位置更新映射活动

1 个答案: